Update changelogs from fern repo (#5087)

Co-authored-by: dsinghvi <10870189+dsinghvi@users.noreply.github.com>

Author: fern-support

fern/products/cli-api-reference/cli-changelog/2026-04-22.mdx

@@ -1,3 +1,9 @@
+## 4.86.0
+**`(feat):`** Allow `theme.product-switcher: tabs` in `docs.yml`. When set, the product
+switcher renders as a row of tabs in the docs header on desktop, with a
+dropdown fallback on mobile.
+
+
 ## 4.85.2
 **`(chore):`** Surface descriptive Fiddle error messages (e.g. `GithubAppNotInstalled`) in
 the CLI instead of the generic "Failed to create job. Please try again or